The Valve,check, cataloged under National Stock Number 4820-01-525-9592, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Core Industries Inc. Dba Mueller Steam Specialty. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-525-9592 |
| Primary Part Number | 4.0-72-KQQ-3-Q |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Core Industries Inc. Dba Mueller Steam Specialty |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM 494 CAST MONEL ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM B-148 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | BUNA MFR REF SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | MONEL MFR REF SINGLE MATERIAL RESPONSE STEM |
| Operating Pressure | 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4.0-72-KQQ-3-Q-N0018104MC030-04 | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| 4.0-72-KQQ-3-Q PRIMARY | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
NSN 4820-01-525-9592 is a Valve,check, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-525-9592 has 2 manufacturer part numbers on file: 4.0-72-KQQ-3-Q-N0018104MC030-04 (Core Industries Inc. Dba Mueller Steam Specialty), 4.0-72-KQQ-3-Q (Core Industries Inc. Dba Mueller Steam Specialty).
Key specifications for 4.0-72-KQQ-3-Q: Flow Control Device: DISK; Mounting Position: HORIZONTAL OR VERTICAL; Style Designator: STRAIGHT THRU; Material Document and Classification: ASTM 494 CAST MONEL ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.